obsolete A name for one who threshes grain, which, before the advent of the mechanical thresher, was done by beating (i.e., banging) the grain with a flail on the threshing floor. The phrase eventually came to encompass all servants working on a farm. Let the bang straws finish early today, for the harvest festival is tonight and they deserve a rest from work.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.